EP2412620B1 - Connecting and adjusting structure for crank assembly - Google Patents

Connecting and adjusting structure for crank assembly Download PDF

Info

Publication number
EP2412620B1
EP2412620B1 EP20100170913 EP10170913A EP2412620B1 EP 2412620 B1 EP2412620 B1 EP 2412620B1 EP 20100170913 EP20100170913 EP 20100170913 EP 10170913 A EP10170913 A EP 10170913A EP 2412620 B1 EP2412620 B1 EP 2412620B1
Authority
EP
European Patent Office
Prior art keywords
crank
connector
tube
ball bearing
retaining ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP20100170913
Other languages
German (de)
French (fr)
Other versions
EP2412620A1 (en
Inventor
Chang Hui Lin
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP20100170913 priority Critical patent/EP2412620B1/en
Priority to ES10170913T priority patent/ES2401672T3/en
Publication of EP2412620A1 publication Critical patent/EP2412620A1/en
Application granted granted Critical
Publication of EP2412620B1 publication Critical patent/EP2412620B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M3/00—Construction of cranks operated by hand or foot
    • B62M3/003—Combination of crank axles and bearings housed in the bottom bracket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62K—CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDE-CARS, FORECARS, OR THE LIKE
    • B62K19/00—Cycle frames
    • B62K19/30—Frame parts shaped to receive other cycle parts or accessories
    • B62K19/34—Bottom brackets

Definitions

  • the present invention relates to a connecting and adjusting structure, and more particularly to a connecting and adjusting structure for a crank assembly of a bicycle.
  • a conventional crank assembly of a bicycle such as disclosed in EP-1792 821 is provided to be pedaled by a rider and contains a crank device installed behind a tube member, and includes a central shaft, the central shaft includes a first and a second ball bearings disposed on two sides thereof and fixed in a bottom bracket, and a retaining ring is used to screw the central shaft with the bottom bracket.
  • a connecting method is time consuming and complicated, and a gap results from the working process to loose the crank assembly.
  • the present invention has arisen to mitigate and/or obviate the afore-described disadvantages.
  • the primary object of the present invention is to provide a connecting and adjusting structure for a crank assembly which is capable of overcoming the shortcomings of the conventional a hydraulic brake.
  • Further object of the present invention is to provide a connecting and adjusting structure for a crank assembly that the first and the second connectors are screwed together to be further retained on two sides of the bottom bracket to eliminate a gap among the bottom bracket, the first and the second connectors and the first and the second cranks which results from the working process, and to assemble related components of bicycle and enhance stability of the rotating crank shaft while pedaling the pedal.
  • Another object of the present invention is to provide a connecting and adjusting structure for a crank assembly that the first and the second ball bearings of the first and the second connectors are replaced easily when they are damaged, and the retaining ring is used to retain the dustproof cover and the second ball bearing with the second crank to adjust the distance among the second crank, the bottom bracket, and the first crank quickly.
  • a connecting and adjusting structure for a crank assembly provided by the present invention contains:
  • a connecting and adjusting structure for a crank assembly in accordance with a preferred embodiment of the present invention is used in a bottom bracket 80 and a crank shaft of a bicycle, and comprises a first connector 20, a second connector 30, a first crank 40, a second crank 50, a first ball bearing 81, a second ball bearing 82, a retaining ring 60, a dustproof cover 61, a screw 70, and a chainwheel 83, wherein a first tube 21 of the first connector 20 includes a first hollow portion 211 formed therein, the first hollow portion 211 includes inner threads 22 arranged on a rear side thereof to screw with outer threads 32 of the second connector 30, the first connector 20 includes a first bearing seat 23 disposed on a front end of the first tube 21 thereof to receive the first ball bearing 81, and the first bearing seat 23 includes a first engaging tab 24, a first adjusting rib 25, and the first tube 21 mounted around a rear side thereof, a second tube 31 of the second connector 30 includes
  • the second crank 50 includes a central shank 51 disposed on a center thereof, and the central shank 51 is hollow and includes a plurality of T-shaped teeth 52 arranged around a distal end thereof, second internal screws 53 arranged therein.
  • the first crank 40 includes a paw portion 41 disposed on an outer rim of an upper side thereof to lock the chainwheel 83, includes a hollow post 42 mounted on a center thereof, the hollows post 42 includes a Tee groove 43 fixed therein to engage with the T-shaped teeth 52 of the central shank 51 of the second crank 50, and then the screw 70 is inserted through the hollow post 42 of the first crank 40 to be screwed with the second internal screws 53 of the second crank 50, thus obtaining the connecting and adjusting structure of the crank assembly.
  • first and the second connectors 20, 30 are screwed together to be further retained on two sides of the bottom bracket 80 to eliminate a gap among the bottom bracket 80, the first and the second connectors 20, 30, and the first and the second cranks 40, 50 which results from the working process, and to assemble related components of bicycle and enhance stability of the rotating crank shaft while pedaling the pedal. Furthermore, the first and the second ball bearings 81, 82 of the first and the second connectors 20, 30 are replaced easily when they are damaged, and the retaining ring 60 is used to retain the dustproof cover 61 and the second ball bearing 82 with the second crank 50 to adjust the distance among the second crank 50, the bottom bracket 80, and the first crank 40 quickly.
  • the first and the second connectors 20, 30 are screwed together to be retained on the two sides of the bottom bracket 80 and further to be connected with a bicycle frame, and then the paw portion 41 of the first crank 40 is coupled with the chainwheel 83 and the second ball bearing 82 and is further fitted to the first connector 20, thereafter the retaining ring 60 and the dustproof cover 61 are fitted into the second bearing seat 33 of the second connector 30 so that the second crank 50 is connected with the first ball bearing 81 and fitted into the second connector 30, and then the screw 70 is inserted into the hollows post 42 of the first crank 40 to screw with the second internal screws 53 so that the first and the second cranks 40, 50 are retained tightly with each other, and the retaining ring 60 is rotated tightly to adjust the first ball bearing 81 and the distance among the second crank 50, the bottom bracket 80, and the first crank 40, thereafter a screwing element 90 is applied to engage the retaining ring 60 with the second bearing seat 33 of the second connector 30, thus finishing assembly.

Description

    BACKGROUND OF THE INVENTION Field of the Invention
  • The present invention relates to a connecting and adjusting structure, and more particularly to a connecting and adjusting structure for a crank assembly of a bicycle.
    • Description of the Prior Art
  • A conventional crank assembly of a bicycle such as disclosed in EP-1792 821 is provided to be pedaled by a rider and contains a crank device installed behind a tube member, and includes a central shaft, the central shaft includes a first and a second ball bearings disposed on two sides thereof and fixed in a bottom bracket, and a retaining ring is used to screw the central shaft with the bottom bracket. However, such a connecting method is time consuming and complicated, and a gap results from the working process to loose the crank assembly.
  • Moreover, the ball bearing contact with the crank at a small area or some points that will deform the crank during pedaling the pedal.
  • The present invention has arisen to mitigate and/or obviate the afore-described disadvantages.
    • SUMMARY OF THE INVENTION
  • The primary object of the present invention is to provide a connecting and adjusting structure for a crank assembly which is capable of overcoming the shortcomings of the conventional a hydraulic brake.
  • Further object of the present invention is to provide a connecting and adjusting structure for a crank assembly that the first and the second connectors are screwed together to be further retained on two sides of the bottom bracket to eliminate a gap among the bottom bracket, the first and the second connectors and the first and the second cranks which results from the working process, and to assemble related components of bicycle and enhance stability of the rotating crank shaft while pedaling the pedal.
  • Another object of the present invention is to provide a connecting and adjusting structure for a crank assembly that the first and the second ball bearings of the first and the second connectors are replaced easily when they are damaged, and the retaining ring is used to retain the dustproof cover and the second ball bearing with the second crank to adjust the distance among the second crank, the bottom bracket, and the first crank quickly.
  • To obtain the above objectives, a connecting and adjusting structure for a crank assembly provided by the present invention contains:
    • a first connector, a second connector, a first crank, a second crank, a first ball bearing, a second ball bearing, a retaining ring, a dustproof cover, a screw, and a chainwheel, wherein a first tube of the first connector includes a first hollow portion formed therein, the first connector includes a first bearing seat disposed on a front end of the first tube thereof to receive the first ball bearing, and the first bearing seat includes a first engaging tab, a first adjusting rib, and the first tube mounted around a rear side thereof, the second connector includes a second bearing seat disposed on a rear end of a second tube thereof to receive the second ball bearing, the dustproof cover, and the retaining ring, the second bearing seat includes a second engaging tab, a second adjusting rib, and the second tube fixed on a front side thereof, the second crank includes a central shank disposed on a center thereof, and the central shank is hollow and includes a plurality of T-shaped teeth arranged around a distal end thereof and second internal screws arranged therein, the first crank includes a hollow post mounted on a center thereof, the hollows post includes a Tee groove fixed therein to engage with the T-shaped teeth of the central shank of the second crank, and the screw is inserted through the hollow post of the first crank to be screwed with the second internal screws of the second crank and the further features of claim 1.
    BRIEF DESCRIPTION OF THE DRAWINGS
    • Fig. 1 is a perspective view showing the exploded components of a connecting and adjusting structure for a crank assembly according to a preferred embodiment of the present invention;
    • Fig. 2 is a perspective view showing the assembly of the connecting and adjusting structure for the crank assembly according to the preferred embodiment of the present invention;
    • Fig. 3 is a cross sectional view showing the assembly of the connecting and adjusting structure for the crank assembly according to the preferred embodiment of the present invention;
    • Fig. 4 is a bottom plan view showing the assembly of the connecting and adjusting structure for the crank assembly according to the preferred embodiment of the present invention;
    • Fig. 5 is a front plan view showing the assembly of the connecting and adjusting structure for the crank assembly according to the preferred embodiment of the present invention;
    • Fig. 6 is a plan view showing the exploded components of the connecting and adjusting structure for the crank assembly according to the preferred embodiment of the present invention.
    DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • The present invention will be clearer from the following description when viewed together with the accompanying drawings, which show, for purpose of illustrations only, the preferred embodiment in accordance with the present invention.
  • Referring to Figs. 1-6, a connecting and adjusting structure for a crank assembly in accordance with a preferred embodiment of the present invention is used in a bottom bracket 80 and a crank shaft of a bicycle, and comprises a first connector 20, a second connector 30, a first crank 40, a second crank 50, a first ball bearing 81, a second ball bearing 82, a retaining ring 60, a dustproof cover 61, a screw 70, and a chainwheel 83, wherein a first tube 21 of the first connector 20 includes a first hollow portion 211 formed therein, the first hollow portion 211 includes inner threads 22 arranged on a rear side thereof to screw with outer threads 32 of the second connector 30, the first connector 20 includes a first bearing seat 23 disposed on a front end of the first tube 21 thereof to receive the first ball bearing 81, and the first bearing seat 23 includes a first engaging tab 24, a first adjusting rib 25, and the first tube 21 mounted around a rear side thereof, a second tube 31 of the second connector 30 includes a second hollow portion 311 formed therein, and the second hollow portion 311 includes the outer threads 32 arranged on a front side thereof to screw with the inner threads 22 of the first connector 20, the second connector 30 includes a second bearing seat 33 disposed on a rear end of the second tube 31 thereof to receive the second ball bearing 82, the dustproof cover 61, and the retaining ring 60, the second bearing seat 33 includes a second engaging tab 34, a second adjusting rib 35, and the second tube 31 fixed on a front side thereof, and includes external screws 36 secured on a front end thereof to screw with first internal screws 62 of the retaining ring 60 so that the retaining ring 60 is rotated to push the dustproof cover 61 to contact with the first ball bearing 81 tightly, thus adjusting a distance among the second crank 50, the bottom bracket 80, and the first crank 40. The second crank 50 includes a central shank 51 disposed on a center thereof, and the central shank 51 is hollow and includes a plurality of T-shaped teeth 52 arranged around a distal end thereof, second internal screws 53 arranged therein. The first crank 40 includes a paw portion 41 disposed on an outer rim of an upper side thereof to lock the chainwheel 83, includes a hollow post 42 mounted on a center thereof, the hollows post 42 includes a Tee groove 43 fixed therein to engage with the T-shaped teeth 52 of the central shank 51 of the second crank 50, and then the screw 70 is inserted through the hollow post 42 of the first crank 40 to be screwed with the second internal screws 53 of the second crank 50, thus obtaining the connecting and adjusting structure of the crank assembly.
  • Thereby, the first and the second connectors 20, 30 are screwed together to be further retained on two sides of the bottom bracket 80 to eliminate a gap among the bottom bracket 80, the first and the second connectors 20, 30, and the first and the second cranks 40, 50 which results from the working process, and to assemble related components of bicycle and enhance stability of the rotating crank shaft while pedaling the pedal. Furthermore, the first and the second ball bearings 81, 82 of the first and the second connectors 20, 30 are replaced easily when they are damaged, and the retaining ring 60 is used to retain the dustproof cover 61 and the second ball bearing 82 with the second crank 50 to adjust the distance among the second crank 50, the bottom bracket 80, and the first crank 40 quickly.
  • As shown in Fig. 6, in assembly, the first and the second connectors 20, 30 are screwed together to be retained on the two sides of the bottom bracket 80 and further to be connected with a bicycle frame, and then the paw portion 41 of the first crank 40 is coupled with the chainwheel 83 and the second ball bearing 82 and is further fitted to the first connector 20, thereafter the retaining ring 60 and the dustproof cover 61 are fitted into the second bearing seat 33 of the second connector 30 so that the second crank 50 is connected with the first ball bearing 81 and fitted into the second connector 30, and then the screw 70 is inserted into the hollows post 42 of the first crank 40 to screw with the second internal screws 53 so that the first and the second cranks 40, 50 are retained tightly with each other, and the retaining ring 60 is rotated tightly to adjust the first ball bearing 81 and the distance among the second crank 50, the bottom bracket 80, and the first crank 40, thereafter a screwing element 90 is applied to engage the retaining ring 60 with the second bearing seat 33 of the second connector 30, thus finishing assembly.
  • While we have shown and described various embodiments in accordance with the present invention, it is clear to those skilled in the art that further embodiments may be made without departing from the scope of the present invention.

Claims (2)

  1. A crank assembly including a connecting and adjusting structure for a bottom bracket (80) and a crank shaft of a bicycle, comprising a first connector (20), a second connector (30), a first crank (40), a second crank (50), a first ball bearing (81), a second ball bearing (82), a retaining ring (60), a dustproof cover (61), a screw (70), and a chainwheel (83), wherein a first tube (21) of the first connector (20) includes a first hollow portion (211) formed therein, the first connector (20) includes a first bearing seat (23) disposed on a front end of the first tube (21) thereof to receive the first ball bearing (81), and the first bearing seat (23) includes a first engaging tab (24), a first adjusting rib (25), and the first tube (21) mounted around a rear side thereof, the second connector (30) includes a second bearing seat (33) disposed on a rear end of a second tube (31) thereof to receive the second ball bearing (82), the dustproof cover (61), and the retaining ring (60), the second bearing seat (33) includes a second engaging tab (34), a second adjusting rib (35), and the second tube (31) fixed on a front side thereof, the second crank (50) includes a central shank (51) disposed on a center thereof, and the central shank (51) is hollow and includes a plurality of T-shaped teeth (52) arranged around a distal end thereof and second internal screws (53) arranged therein, the first crank (40) includes a hollow post (42) mounted on a center thereof, the hollow post (42) includes a Tee groove (43) fixed therein to engage with the T-shaped teeth (52) of the central shank (51) of the second crank (50), and the screw (70) is inserted through the hollow post (42) of the first crank (40) to be screwed with the second internal screws (53) of the second crank (50);
    wherein the first hollow portion (211) includes inner threads (22) arranged on a rear side thereof to screw with outer threads (32) of the second connector (30);
    wherein the second bearing seat (33) includes external screws (36) secured on a front end thereof to screw with first internal screws (62) of the retaining ring (60) so that the retaining ring (60) is rotated to push the dustproof cover (61) to contact with the first ball bearing (81) tightly.
  2. The crank assembly as claimed in claim 1, wherein the first crank (40) includes a paw portion (41) disposed on an outer rim of an upper side thereof to lock the chainwheel (83).
EP20100170913 2010-07-27 2010-07-27 Connecting and adjusting structure for crank assembly Not-in-force EP2412620B1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP20100170913 EP2412620B1 (en) 2010-07-27 2010-07-27 Connecting and adjusting structure for crank assembly
ES10170913T ES2401672T3 (en) 2010-07-27 2010-07-27 Connection and adjustment structure for connecting rod assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20100170913 EP2412620B1 (en) 2010-07-27 2010-07-27 Connecting and adjusting structure for crank assembly

Publications (2)

Publication Number Publication Date
EP2412620A1 EP2412620A1 (en) 2012-02-01
EP2412620B1 true EP2412620B1 (en) 2013-03-13

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ID=43132545

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100170913 Not-in-force EP2412620B1 (en) 2010-07-27 2010-07-27 Connecting and adjusting structure for crank assembly

Country Status (2)

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EP (1) EP2412620B1 (en)
ES (1) ES2401672T3 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10562588B2 (en) 2015-09-01 2020-02-18 The Hive Global, Inc Bicycle cassette with locking connection
WO2017165226A1 (en) 2016-03-24 2017-09-28 The Hive Global, Inc. Bicycle crank with spindle attachment structure
WO2019040340A1 (en) 2017-08-21 2019-02-28 The Hive Global, Inc. Bicycle cassette with clamping connection
US11932351B2 (en) 2020-07-17 2024-03-19 The Hive Global, Inc. Conical bicycle cassette sprocket structure

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1268351A (en) * 1917-11-12 1918-06-04 Homer E Hogue Crank-hanger.
EP1792821A1 (en) * 2005-12-02 2007-06-06 CAMPAGNOLO S.r.l. Bottom bracket assembly of a bicycle
US7650818B2 (en) * 2007-03-30 2010-01-26 Shimano Inc. Bicycle shaft component
FR2924088A1 (en) * 2007-11-22 2009-05-29 Jean Yves Delale Bicycle crankset for driving wheels, has main shaft that is connected in rotation to crank levers, and universal accommodation unit that is driven in rotation by crank levers, where unit places and removes flange by interlocking

Also Published As

Publication number Publication date
ES2401672T3 (en) 2013-04-23
EP2412620A1 (en) 2012-02-01

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